Add request spec for asciicast upload

spec/requests/asciicast_upload_spec.rb

@@ -0,0 +1,13 @@
+require 'spec_helper'
+
+describe "Asciicast upload" do
+  it 'returns the URL to the uploaded asciicast' do
+    post '/api/asciicasts', :asciicast => {
+      :meta          => fixture_file_upload("spec/fixtures/meta.json", "application/json"),
+      :stdout        => fixture_file_upload("spec/fixtures/stdout", "application/octet-stream"),
+      :stdout_timing => fixture_file_upload("spec/fixtures/stdout.time", "application/octet-stream")
+    }
+
+    expect(response.body).to eq(asciicast_url(Asciicast.last))
+  end
+end